Patents by Inventor Eckart Schonfelder

Eckart Schonfelder has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9731331
    Abstract: The demulsifying cleaning of metallic surfaces which may be contaminated with oil(s) with at least one further nonpolar organic compound, with fat(s), with soap(s), with particulate dirt or with at least one anionic organic compound using an aqueous, alkaline, surfactant-containing bath solutions.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: August 15, 2017
    Assignee: CHEMETALL GMBH
    Inventors: Stella Bauerochse, Carola Komp, Ralph Van Den Berg, Peter Claude, Franz Dressler, Joachim Geldner, Zafer Yuksel, Eckart Schonfelder
  • Patent number: 9464259
    Abstract: The invention relates to an aqueous alkaline cleaning composition for cleaning metal surfaces, containing at least one non-ionic surfactant having demulsifying action and based on ethoxylated alkyl alcohols having one or two alkyl groups, each comprising an average of 7.5 to 16.5 carbon atoms, and an average of 5.5 to 18.5 EO groups per alkyl group, and comprising an end group closure or two end group closures, of which at least one end group closure is an isopropyl, isobutyl, tertiary butyl and/or benzyl group, wherein the surfactant is not propoxylated.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: October 11, 2016
    Assignee: Chemetall GmbH
    Inventors: Carola Komp, Eckart Schonfelder
  • Patent number: 9364855
    Abstract: This invention relates to a method for phosphating metal surfaces in which the metal surfaces are treated with an aqueous phosphate and titanium-based colloidal activating agent prior to phoshating, wherein the activating agent comprises at least one water-soluble silicon compound having at least one organic group. The invention also relates to a corresponding activating agent.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: June 14, 2016
    Assignee: Chemetall GmbH
    Inventors: Thomas Kolberg, Eckart Schönfelder, Olaf Dahlenburg, Manfred Walter
  • Publication number: 20140311533
    Abstract: The demulsifying cleaning of metallic surfaces which may be contaminated with oil(s) with at least one further nonpolar organic compound, with fat(s), with soap(s), with particulate dirt or with at least one anionic organic compound using an aqueous, alkaline, surfactant-containing bath solutions.
    Type: Application
    Filed: July 2, 2014
    Publication date: October 23, 2014
    Inventors: Stella BAUEROCHSE, Carola KOMP, Ralph VAN DEN BERG, Peter CLAUDE, Franz DRESSLER, Joachim GELDNER, Zafer YUKSEL, Eckart SCHONFELDER
  • Publication number: 20140041693
    Abstract: The demulsifying cleaning of metallic surfaces which may be contaminated with oil(s) with at least one further nonpolar organic compound, with fat(s), with soap(s), with particulate dirt or with at least one anionic organic compound using an aqueous, alkaline, surfactant-containing bath solutions.
    Type: Application
    Filed: October 16, 2013
    Publication date: February 13, 2014
    Applicant: Chemetall GmbH
    Inventors: Stella BAUEROCHSE, Carola KOMP, Ralph VAN DEN BERG, Peter CLAUDE, Franz DRESSLER, Joachim GELDNER, Zafer YUKSEL, Eckart SCHONFELDER
  • Patent number: 8609195
    Abstract: The demulsifying cleaning of metallic surfaces which may be contaminated with oil(s) with at least one further nonpolar organic compound, with fat(s), with soap(s), with particulate dirt or with at least one anionic organic compound using an aqueous, alkaline, surfactant-containing bath solutions.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: December 17, 2013
    Assignee: Chemetall GmbH
    Inventors: Stella Bauerochse, Carola Komp, Ralph Van Den Berg, Peter Claude, Franz Dressler, Joachim Geldner, Zafer Yuksel, Eckart Schonfelder
  • Publication number: 20120273013
    Abstract: The demulsifying cleaning of metallic surfaces which may be contaminated with oil(s) with at least one further nonpolar organic compound, with fat(s), with soap(s), with particulate dirt or with at least one anionic organic compound using an aqueous, alkaline, surfactant-containing bath solutions.
    Type: Application
    Filed: July 11, 2012
    Publication date: November 1, 2012
    Inventors: Stella Bauerochse, Carola Komp, Ralph Van Den Berg, Peter Claude, Franz Dressler, Joachim Geldner, Zafer Yuksel, Eckart Schonfelder
  • Publication number: 20110226159
    Abstract: This invention relates to a method for phosphating metal surfaces in which the metal surfaces are treated with an aqueous phosphate and titanium-based colloidal activating agent prior to phoshating, wherein the activating agent comprises at least one water-soluble silicon compound having at least one organic group. The invention also relates to a corresponding activating agent.
    Type: Application
    Filed: December 9, 2009
    Publication date: September 22, 2011
    Inventors: Thomas Kolberg, Eckart Schönfelder, Olaf Dahlenburg, Manfred Walter
  • Publication number: 20110180186
    Abstract: A method for the treatment or pre-treatment of surfaces of metal objects by means of an acidic, aqueous solution containing zinc and phosphate. The phosphating solution contains between 0.1-10 g/L, zinc, 4-50 g/L phosphate calculated as PO4, between 0.03-3 g/L, of at least one guanidine compound comprising at least one nitro group calculated as nitroguanidine, and between 0.001-0.9 g/L hydrogen peroxide and has a temperature of less than 80° C. The corresponding acidic, aqueous composition and finished products are also disclosed.
    Type: Application
    Filed: April 7, 2011
    Publication date: July 28, 2011
    Inventors: Thomas Nitschke, Rudiger Rein, Eckart Schönfelder, Peter Schubach, Jürgen Specht
  • Publication number: 20100222248
    Abstract: The invention relates to an aqueous alkaline cleaning composition for cleaning metal surfaces, containing at least one non-ionic surfactant having demulsifying action and based on ethoxylated alkyl alcohols having one or two alkyl groups, each comprising an average of 7.5 to 16.5 carbon atoms, and an average of 5.5 to 18.5 EO groups per alkyl group, and comprising an end group closure or two end group closures, of which at least one end group closure is an isopropyl, isobutyl, tertiary butyl and/or benzyl group, wherein the surfactant is not propoxylated.
    Type: Application
    Filed: September 30, 2008
    Publication date: September 2, 2010
    Inventors: Carola Komp, Eckart Schönfelder
  • Patent number: 7754277
    Abstract: An automated process for the antistatic coating of plastic molding surfaces or for plastic-based or lacquer-based coatings by contacting the surface with a solution containing at least one surfactant, at least 20 wt. % of an organic solvent and, optionally, water.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: July 13, 2010
    Assignee: Chemetall GmbH
    Inventors: Franz Dressler, Eckart Schonfelder
  • Publication number: 20100068392
    Abstract: The demulsifying cleaning of metallic surfaces which may be contaminated with oil(s) with at least one further nonpolar organic compound, with fat(s), with soap(s), with particulate dirt or with at least one anionic organic compound using an aqueous, alkaline, surfactant-containing bath solutions.
    Type: Application
    Filed: March 26, 2007
    Publication date: March 18, 2010
    Inventors: Stella Bauerochse, Carola Komp, Ralph Van Den Berg, Peter Claude, Franz Dressler, Joachim Geldner, Zafer Yuksel, Eckart Schonfelder
  • Patent number: 7041629
    Abstract: The inventive aqueous pickling agent on the basis of sulfuric acid or phosphoric acid and hydrogen fluoride for stainless steels, which pickling agent is free of wetting and emulsifying agents, contains (each as 100 wt-% substance) 1.5 to 16 wt-% sulfuric acid or 2.0 to 30 wt-% phosphoric acid as well as 0.5 to 14 wt-% hydrogen fluoride and 0.5 to 15.5 wt-% acid-soluble aromatic nitro compound. An iron(III) compound is not supplied to said pickling agent. Merely in the starting phase, an oxidizing agent can be supplied, which oxidizes iron(II) to form iron(III). As acid-soluble aromatic nitro compound m-nitrobenzene sulfonate and/or 3-nitrophthalate are particularly advantageous. The inventive pickling agent can be used as bath pickle and —when adding 2.5 to 5.5 wt-% magnesium and/or magnesium compound (calculated as Mg)—also as spraying pickle or brush pickle.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: May 9, 2006
    Assignee: Chemetall GmbH
    Inventors: Eckart Schonfelder, Gunther Schwane, Harald Werner
  • Publication number: 20040209101
    Abstract: The invention relates to an automated process for the antistatic coating of plastic moulding surfaces after production of the plastic moulding or after subsequent optional working of the moulding or finishing of the surface, and before cleaning of the plastic moulding by an aqueous washing process, and/or before polarization by chemical and/or physical methods, or to an automated process for the antistatic coating of the surface of a plastic-coated and/or lacquer-coated moulding prior to cleaning and/or lacquering of the coated moulding, an antistatic coating being applied by bringing the plastic and/or lacquer surface into contact with a solution containing at least one surfactant and at least 20 wt.
    Type: Application
    Filed: June 1, 2004
    Publication date: October 21, 2004
    Inventors: Franz Dressler, Eckart Schonfelder
  • Publication number: 20040053801
    Abstract: The inventive aqueous pickling agent on the basis of sulfuric acid or phosphoric acid and hydrogen fluoride for stainless steels, which pickling agent is free of wetting and emulsifying agents, contains (each as 100 wt-% substance)
    Type: Application
    Filed: August 26, 2003
    Publication date: March 18, 2004
    Inventors: Eckart Schonfelder, Gunther Schwane, Harald Werner